MATERIALS RESEARCH BULLETIN
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2025
·
IF 5.7
Ru Jia,Fugui Xiao,Qiaofang Fu,Ying Wu
BiOI was modified with poly(3,4-ethylenedioxythiophene)-polystyrene sulfonate (PEDOT:PSS) to function as an organic hole conductor, thereby accelerating the transfer of light-generated holes. Subsequently, the catalyst was immobilized on ZIF-8 to enhance the contact area between the active sites of the catalyst and the pollutant. The successful preparation of the ZIF-8@BiOI/PEDOT:PSS was confirmed through various characterizations. Compared to pure BiOI, the ZIF-8@BiOI/PEDOT:PSS composite material demonstrates markedly enhanced visible-light-driven photocatalytic activity in the degradation of Rhodamine B (RhB) dye. The ZIF-8@BiOI/PEDOT:PSS composite photocatalyst exhibits a maximum RhB degradation efficiency of 92.64%, with a degradation rate constant (k) approximately 2.9 times higher than that of pure BiOI. Additionally, the ZIF-8@BiOI/PEDOT:PSS also exhibits outstanding photocatalytic performance in the degradation of methylene blue and methyl orange. Moreover, its catalytic activity remains nearly unchanged after five consecutive reuse cycles, demonstrating excellent recyclability. This study presents a novel strategy for improving the photocatalytic performance of such materials.
研究领域:
材料科学
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环境科学
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纳米技术
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催化
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化学工程
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Zhipeng Mao,Wei Hao,Wei Wang,Fubin Ma,Chengcheng Ma,Shougang Chen
As an influential antifouling material, photocatalytic materials have drawn attention increasingly over recent years owing to their potential bacteriostatic property in the domain of marine antifouling. Herein, a flower-like BiOI@CeO 2 @Ti 3 C 2 S-scheme photocatalyst was contrived and prepared by hydrothermal method . The innovative combination of Ti 3 C 2 and narrow band gap semiconductor BiOI was implemented to modify CeO 2 and the photocatalytic bacteriostatic mechanism of BiOI@CeO 2 @Ti 3 C 2 was elucidated. Schottky junction was formed between CeO 2 and Ti 3 C 2 , and a p-n junction was formed between CeO 2 and BiOI. By photoelectrochemical characterization, BCT-10 exhibits the best photoelectrochemical performance of which photogenerated carrier transport can be performed more readily at 10 % CeO 2 @Ti 3 C 2 addition. 99.76 % and 99.89 % of photocatalytic bacteriostatic efficiency of BCT-10 against Escherichia coli and Staphylococcus aureus were implemented respectively, which were 2.98 and 3.07 times higher than that of pure CeO 2 . The ternary heterojunction can suppress photogenerated electron-hole complexes more effectively and enhance the photocatalytic bacteriostatic effect of CeO 2 , which also provided a new concept to the further broadened application of CeO 2 in the marine bacteriostatic and antifouling field.
研究领域:
材料科学
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环境科学
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微生物学
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产品关联
DOI
PubMed
高影响因子
NANO
·
2018
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IF 1.1
Yongmei Xia,Zuming He,Jiangbin Su,Ya Liu,Bin Tang,Xiaoping Li
Novel n-SrTiO 3 /p-BiOI heterojunction composites were successfully fabricated by loading SrTiO 3 particles onto the surface of BiOI nanoflakes via a two-step method. The as-prepared samples were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), field-emission scanning electron microscopy (FE-SEM), energy-disperse X-ray spectroscopy (EDS), transmission electron microscopy (TEM), Brunauer–Emmett–Teller (BET), diffuse reflectance spectroscopy (DRS) and electrochemical measurements. The results show that the n-SrTiO 3 /p-BiOI heterojunction composites are composed of perovskite structure SrTiO 3 and tetragonal phase BiOI. The composites exhibit excellent photocatalytic performance for the degradation of crystal violet (CV) solution under simulated solar light irradiation, which is superior to that of pristine BiOI and SrTiO 3 . The 30 wt.%SrTiO 3 /BiOI composite is found to be the optimal composite, over which the dye degradation reaches 92.5% for 30 min of photocatalysis. The photocatalytic activity of the 30 wt.%SrTiO 3 /BiOI composite is found to be 3.94 times and 28.2 times higher than that of bare BiOI and SrTiO 3 , respectively. The reactive species trapping experiments suggest that • O 2 − and holes are the main active species responsible for the CV degradation. In addition, the electrochemical measurements elucidate the effective separation of photoinduced electron–hole pairs. Moreover, on the basis of experimental and theoretical results, a possible mechanism for the enhanced photocatalytic performance of the SrTiO 3 /BiOI heterojunction composites is also proposed.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2020
·Vol. 46
·期 6
·2951-2967
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IF 2.262
Zheng Wei,Feng Sheng,Shao Cong,Zhu Guiliang,Ni Ziqiu,Sun Jiajia,Huang Xianglin
A novel binary photocatalytic composite (BiOI/ZIF-8) was successfully constructed by solvothermal method. Its crystal morphology, chemical state of the elements and electrochemical properties were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, transmission electron microscopy, scanning electron microscopy, X-ray photoelectron spectroscopy and photoluminescence analysis. Appropriate ZIF-8 doping enhanced the separation and utilization of photogenerated electrons, promoted the capture of contaminants and rapidly produces active species, thereby accelerating the photocatalytic degradation of contaminants. Degradation experiments on BPA showed that the photocatalytic property of BiOI/ZIF-8 (0.5) was significantly improved compared with the parent material. BiOI/ZIF-8 (0.5) showed the highest reaction rate constant (0.06061 min −1 ), 9.2 times that of BiOI (0.00659 min −1 ) and 23.3 times that of ZIF-8 (0.0026 min −1 ). In addition, five cycle tests showed that BiOI/ZIF-8 was highly efficient in recycling and stability. Through capture experiments, superoxide free radicals ·OH, h − and ·O 2 − play an important role in degrading BPA, among which superoxide free radicals h + play a major role.
研究领域:
材料科学
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环境科学
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光催化技术
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DOI
高影响因子
APPLIED SURFACE SCIENCE
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2022
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IF 7.392
Zhou Cao,Yunpu Zhao,Zhaohui Zhou,Qizhao Wang,Qiong Mei,Hongfei Cheng
Long-term exposure to antibiotic may have adverse effects on human health including carcinogenesis or teratogenicity and the emergence of antibiotic resistance. Developing effective catalysts to degrade antibiotic pollution is an urgent demand. Herein, a heterogeneous photo-Fenton catalyst with enhanced tetracycline hydrochloride (TCH) degradation activity was developed by hydrothermally synthesizing lanthanum ferrite (LaFeO 3 ) and bismuth iodide oxide (BiOI). LaFeO 3 /BiOI showed excellent repeatability and stability, and still maintained an extremely high degradation efficiency of 80.6% after three cycles. The LaFeO 3 /BiOI with 35 wt% LaFeO 3 showed significantly enhanced degradation rate (93.6%) of TCH within 40 mins in the photo-Fenton system, compared with single photocatalytic degradation (41.2%) and Fenton degradation (83.1%). The parameter characterization and quenching experiments were carried out on the heterojunction . The possible degradation mechanisms of TCH were proposed. The results indicated that the existence of the built-in electric field in the heterojunction effectively promote the separation of photogenerated electrons and hole pairs. The photoelectrons activate H 2 O 2 to generate OH and accelerate Fe III /Fe II conversion. This work has developed a promising heterogeneous photo-Fenton catalysts, and stipulated some new insights for the removal of antibiotic pollutants.
研究领域:
环境科学
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材料科学
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生物学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Huiyun Xia,Zeliang Wu,Wenshuo Zhang,Lifang Song,Xu Li,Liying Cui,Yanhui Niu
In this study, a BiOI/Bi 5 O 7 I photocatalyst is synthesized using a co-precipitation method. The degradation efficiency of NO can reach 70 % under visible light. Subsequently, water-based polyurethane is used as the film-forming matrix, and fluorinated silane is used as low surface energy components, a BiOI/Bi 5 O 7 I water-based polyurethane photocatalytic superhydrophobic coating (FBIU) is prepared by a layer-by-layer spraying technique. The high catalytic activity of BiOI/Bi 5 O 7 I comes from the heterojunction effect of the two semiconductors and the improved interface, which enables the degradation rate of NO to reach 76.9 %, accompanied by extremely low NO 2 conversion rate (<1 %). The wettability, chemical stability and mechanical stability of the FBIU coating are studied to investigate its impact on the long-term oxidative degradation performance of NO. And the self-cleaning characteristics and specific micro-nano structure of FBIU improve the wear resistance of the coating, manifested as a contact angle of 157.8° to water after 320 times of sandpaper polishing. Finally, based on the photocatalytic mechanism of BiOI/Bi 5 O 7 I semiconductor materials, a green long-term purification and degradation mechanism of NO by coatings is proposed. This can provide some insights into the design of air purification coatings for building exterior walls.
研究领域:
材料科学
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环境科学
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化学工程
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产品关联
DOI
高影响因子
Catalysts
·
2023
·Vol. 13
·期 3
·457
·
IF 3.9
Tasie Ebenezer Onyedika,Mengying Xu,Yichao Deng,Yang Liu,Lian Li,Pier-Luc Tremblay,Tian Zhang
Adsorption is a low-energy, economical, and efficient method for pollutant removal from water. Because of their unique structure, large specific surface area (SSA), and non-toxicity, bismuth-based semiconductors, usually researched for the photodegradation of organic molecules, are also excellent for dark adsorption processes. Here, a three-dimensional adsorbent with a heterostructure with a hydrangea-like shape made of Bi2MoO6(BMO) and BiOI (BOI) was synthesized by a one-pot solvothermal process and investigated for the adsorption of toxic dyes. BOI/BMO with an I-to-Mo ratio of 2.0 adsorbed 98.9% of the model pollutant rhodamine B (RhB) within 5 min with a maximum adsorption capacity of 72.72 mg/g in the dark at room temperature. When compared to pure BMO, the BOI2/BMO heterostructure was 14.1 times more performant because of its flower-like morphology with multiple planes, an SSA that was 1.6-fold larger, increased porosity, the formation of heterojunctions, and a negative surface charge attracting RhB. Further investigation indicated that adsorption by BOI2/BMO fitted the pseudo-second-order kinetic and the Langmuir isotherm models. In addition, the thermodynamic analysis showed that it was a spontaneous exothermic process probably relying on physisorption. Thus, the BOI/BMO adsorbent developed here is promising for the fast removal of toxic dyes from industrial wastewater.Keywords:BiOI/Bi2MoO6;heterostructure;rhodamine B;dark adsorption;kinetics;thermodynamic
研究领域:
环境科学
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材料科学
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化学工程
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Liyang Zhang,Yangqin Gao,Ziyu Teng,Yida Liu,Xinming Liu,Chuanbo Cong,Kezhen Lai,Linping Li,Jipeng Dong,Ning Li,Lei Ge
Mimicking the movement of leaves in response to external stimulations is inspiring for designing photocatalyst system applicable in space- and weight-sensitive scenarios. Here, we demonstrate that by combining a novel gas–liquid film growth process with a tape assisted film transfer procedure driven by capillary force, a lightweight and twistable photocatalyst assembly can be easily constructed. Taking the gas–liquid interface as a solute transfer boundary to selectively trigger the film growth at the interface, BiOI and BiOI/In 2 O 3 thin films up to 15 cm in diameter can be grown at a solution surface. Thanks to the capillary force present at the dynamic contact front during the film pick-up procedure, the grown film can be peeled off from the solution surface with tape so that a lightweight BiOI/In 2 O 3 /tape assembly can be easily constructed. Due to its low density and the BiOI/In 2 O 3 heterojunction formed, the resulting BiOI/In 2 O 3 /tape assembly exhibits superior photocatalytic activity per gram towards NO removal. Furthermore, the capillary force driven film pick-up process also induces a tight contact between the film and the tape, which makes the assembly highly twistable: its structural integrity and photocatalytic activity are largely preserved after 10,000 twists. Utilizing the film’s flexibility and twistability, we assemble a temperature-, auto-folding/unfolding photocatalyst system by transferring the film onto a memory-alloy-based structure, which mimics the movement of leaves in response to external stimulations and makes the gas–liquid interface-derived BiOI/In 2 O 3 /tape assembly suitable for use in space- and weight-limited environments.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
Heliyon
·
2024
·
IF 3.4
Chenhan Lv,Haixiang Cheng,Rui Fan,Jingyu Sun,Xinghai Liu,Yinghui Ji
Organic fluorine compounds are acute carcinogenic and mutagenic to humans. Photoelectrocatalysis (PEC) treatment is an innovative technology in the field of the removal of fluorine compounds, and thus current research focused on improving stability and catalytic ability of photoanode. In this study, it has been synthesized a rGO/BiOI photocathode for the efficient degradation of 4-Fluoroaniline (4-FA). The physical characterization and photoelectrochemical properties of the photocathode was determined. The results indicate that the PEC treatment with the rGO/BiOI photocathode was more efficient compared with individual processes. During the optimization experiments, the PEC treatment achieved 99.58 % and 72.12 % of 4-FA degradation and defluorination within 1 h. Cyclic stability experiments show that rGO/BiOI photocathode was efficient and stable, which reached 96.91 % and 67.64 % of 4-FA degradation and defluorination after five cycles. Mechanism analysis indicates that the PEC process was based on an electrochemical reaction and photo-induced processes. The degradation product of 4-FA was mainly 2,4-di-t-butylphenol, and trapping experiments indicates that h + is the primary oxidizing species. Therefore, PEC treatment with rGO/BiOI photocathode is a competitive green approach to remove fluorine compounds pollutants and brings new insights into development of PEC treatment.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
Journal of Water Process Engineering
·
2021
·
IF 5.485
Qian Zhao,Liang Hao,Fei Li,Tongyang Liu,Yiqiang He,Jun Yang,Yifan Zhang,Yun Lu
The hydrothermal method was used to prepare flexible BiOCl-BiOI films on one stainless steel wire mesh. Nano-flower like BiOCl-BiOI crystals consisted of nanoplates were formed, and BiOCl was uniformly distributed. The XPS (X-ray photoelectron spectroscopy) spectra confirm the formation of BiOCl-BiOI heterojunction, which enhanced the visible light absorption of the BiOI film. The photocatalytic activity of the BiOCl-BiOI film in degrading RhB and MB was elevated by at most 8.7 and 2.4 times, respectively, comparing with the individual BiOI film. We designed and constructed a piezo/photocatalytic platform in which the prepared BiOCl-BiOI films were fixed on a rotating shaft. Compared with the static state, the photocatalytic activity of the BiOCl-BiOI film was increased by 1.4 times when the shaft was rotating. We believe that the enhancement of the photocatalytic activity should be ascribed to the piezoelectric field by introducing bending deformation, which accelerated the separation of photogenerated electrons and holes. The improvement mechanism of the photocatalytic and piezo/photocatalytic performance was proposed and discussed. The flexible BiOCl-BiOI heterojunction films show significant application potential in the pollution control of fluid fields such as rivers, oceans, waterfalls, and air.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Kang Deng,Xintong You,Minyi Liu,Yongyi Tan,Yilian Lin,Wei Shu,Feiyan Liu,Shunheng Tu,Yi Yang
Herein, we developed a self-assembly heterostructured BiOI/Bi 4 O 5 Br 2 microcluster with the hydrothermal method . Catalysts were mainly characterized by powder X-ray diffraction, field-emission scanning electron microscopy, transmission electron microscope , energy dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy and diffuse reflectance spectra. The results showed that due to charge induction, BiOI nanosheets were successfully self-assembled and deposited on Bi 4 O 5 Br 2 , forming a unique heterojunction and achieving strong transient photocurrent response. Performances of catalysts were tested and effects of different initial concentrations of the Methylparaben (MPB), catalyst dosage, initial pH and total organic carbon (TOC) conversion were studied. Results reveal that catalytic activity increased with lower initial concentration of MPB and the best dosage of catalyst is 0.5 g·L -1 . The BiOI/Bi 4 O 5 Br 2 microcluster exhibits excellent photocatalytic activity under visible-light irradiation, which can degrade 97% MPB in 2 h and the TOC value is only 20% of the original. The catalytic degradation process conforms to pseudo-first-order kinetics with a rate constant of 0.030 min -1 . The results of detailed active species detection indicate that the photogenerated holes and •O 2 − radicals play the main role in the photocatalytic system. In addition, photoelectrochemical measurements reveal that the excellent strengthened photocatalytic activity is due to the high separation and transfer efficiency derived from the heterostructure.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS CHEMISTRY
·
2011
·Vol. 21
·期 33
·12479-12484
·
IF 5.101
Liqun Ye,Lihong Tian,Tianyou Peng,Ling Zan
Highly symmetrical BiOI single-crystal nanosheets (BiOI SCNs) with dominant exposed {001} facets (up to 95%) have been synthesized by annealing BiI3 and characterized by X-ray diffraction, X-ray photoelectron spectroscopy, field emission scanning electron microscopy, transmission electron microscopy, selected area electron diffraction, high-resolution transmission electron microscopy, fast-Fourier transform pattern, UV-vis diffuse reflectance and photoluminescence. The thickness and the {001} facets percentage of BiOI SCNs can be tuned by changing the annealing temperature. The thermal decomposition process of BiI3 and the formation mechanism of BiOI SCNs were investigated. BiOI SCNs exhibit higher photoactivity (about 7 times) than irregular BiOI for degradation of Rhodamine B (RhB) dye under visible light irradiation. The {001} facets are the reactive facets of BiOI. The origin of {001} facets-dependent photoactivity is due to an improvement of the separation efficiency of photo-induced electrons and holes.
研究领域:
材料科学
·
光催化
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）